JP2019154232A5

JP2019154232A5 -

Info

Publication number: JP2019154232A5
Application number: JP2019099642A
Authority: JP
Filing date: 2019-05-28
Publication date: 2020-01-30
Anticipated expiration: 2038-09-11

Description

実施形態によれば、回転子は、中心軸線の回りで円周方向に並んだ複数の磁極のそれぞれについて見たときに、前記磁極の円周方向の端および前記中心軸線を通って放射方向に延びる軸をｑ軸、前記ｑ軸に対して円周方向に電気的に９０度離間した軸をｄ軸としたとき、前記ｑ軸上に前記中心軸線に向かって延在する空隙部が各々形成されており、前記円周方向に隣り合う一対の前記空隙部の間に、一方の前記空隙部に面して形成された第１ブリッジ部と他方の前記空隙部に面して形成された第２ブリッジ部と前記第１ブリッジ部および前記第２ブリッジ部に隣接して形成された磁石埋め込み孔とにより前記ｄ軸を横断してフラックスバリアバンドが形成されている回転子鉄心と、
保磁力と磁化方向厚との積が大きい固定磁力磁石で構成され、前記磁石埋め込み孔内に前記第１ブリッジ部に隣接して配置された第１永久磁石と、
保磁力と磁化方向厚との積が前記第１永久磁石よりも小さい可変磁力磁石で構成され、前記磁石埋め込み孔内に前記第２ブリッジ部に隣接して配置された第２永久磁石と、
を備えている。 According to an embodiment, the rotor radially passes through the circumferential ends of the magnetic poles and the central axis when looking at each of the plurality of magnetic poles circumferentially aligned around the central axis. When the extending axis is the q axis, and the axis electrically separated by 90 degrees in the circumferential direction with respect to the q axis is the d axis, voids extending toward the central axis are formed on the q axis. It is, first the between the pair of the gap portion adjacent to the circumferential direction, are formed facing the first bridge portion and the other of the gap portion formed facing one of the air gap A rotor core in which a flux barrier band is formed across the d-axis by a 2 bridge portion and magnet buried holes formed adjacent to the first bridge portion and the second bridge portion;
A first permanent magnet, which is constituted by a fixed magnetic force magnet having a large product of a coercive force and a thickness in a magnetization direction, and is disposed adjacent to the first bridge portion in the magnet embedding hole;
A second permanent magnet configured by a variable magnetic force magnet having a product of a coercive force and a thickness in a magnetization direction smaller than the first permanent magnet, and disposed in the magnet embedding hole adjacent to the second bridge portion;
It has.

Claims

When looking at each of a plurality of magnetic poles arranged in a circumferential direction around a central axis, an axis extending radially through the circumferential end of the magnetic pole and the central axis is defined as a q-axis and a q-axis. On the other hand, when the axis electrically separated by 90 degrees in the circumferential direction is the d-axis, voids extending toward the center axis are formed on the q-axis, and the gaps are formed adjacent to the circumferential direction. between a pair of said gap portion to fit the first bridge portion and the second bridge portion and which is formed facing the gap portion of the first bridge portion and the other which is formed facing one of the air gap A rotor core in which a flux barrier band is formed across the d-axis by a magnet buried hole formed adjacent to the second bridge portion;
A first permanent magnet, which is constituted by a fixed magnetic force magnet having a large product of a coercive force and a thickness in a magnetization direction, and is disposed adjacent to the first bridge portion in the magnet embedding hole;
A second permanent magnet configured by a variable magnetic force magnet having a product of a coercive force and a thickness in a magnetization direction smaller than the first permanent magnet, and disposed in the magnet embedding hole adjacent to the second bridge portion;
A rotor comprising:

The said 1st permanent magnet is arrange | positioned between the said 1st bridge part and the said d-axis, The said 2nd permanent magnet is arrange | positioned between the said 2nd bridge part and the said d-axis. Rotor as described.

3. The rotor according to claim 1, wherein each of the gaps extends deeper toward the center axis than a position where the first permanent magnet and the second permanent magnet are disposed. 4.

The second permanent magnet is formed by laminating two types of magnets having different products of the coercive force and the thickness in the magnetization direction. The rotor according to any one of claims 1 to 3, wherein the rotor is arranged so as to be located at a position corresponding to a position of the rotor.

The first permanent magnet and the second permanent magnet each have a first side surface facing the outer peripheral direction of the rotor core,
4. The apparatus according to claim 1, wherein at least one of the first permanent magnet and the second permanent magnet is arranged at an angle formed by the d-axis and the first side surface greater than 90 degrees. 5. Rotor as described.

Each magnetic pole of the rotor core includes a magnetic path formed between the first and second permanent magnets and the outer peripheral surface of the rotor core, and a magnetic path formed between the first and second permanent magnets. The rotor according to any one of claims 1 to 3, further comprising a bridge portion provided therebetween, and a gap extending from the outer peripheral surface to the bridge portion in the magnetic path.

The rotor according to claim 1, wherein the second bridge portion is formed thicker than the first bridge portion.

A stator having a stator core and an armature winding;
A rotor according to any one of claims 1 to 7,
A rotating electric machine comprising: